Sei serves as plumbing for the future financial system - infrastructure to support capital markets, starting with exchanges. As the first Layer 1 specialized for trading, Sei is the fastest chain to finality, optimizing every layer of its stack to give exchanges an unfair advantage.
Exchanges are the killer app of crypto, but current Layer 1s hold them back. Most L1s fall into two extremes, general purpose and app-specific. Sei unlocks a new design space in between as a sector-specific L1. There are currently 60+ teams from Solana, Polkadot, Terra, and NEAR building on top of Sei going into mainnet launch. Sei is backed by Multicoin, Delphi, Tangent, and several MMs like Hudson River Trading, GSR.